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Cannot add controller replica to the existing UCP cluster


(Hgupta123) #1

I have UCP cluster with 3 controllers and 3 regular nodes. I was able to successfully setup the cluster the first time. However, I am trying to do a fresh-install on one of the controllers but i am getting the following error while running the join command:

INFO[0001] Verifying your system is compatible with UCP
INFO[0001] Checking that required ports are available and accessible
INFO[0117] Starting local swarm containers
INFO[0120] Starting UCP Controller replica containers
ERRO[0120] Server response: {“message”:“etcdserver: peerURL exists”}
ERRO[0120] Failed to start KV store. Run “docker logs ucp-kv” for more details
FATA[0120] Failed to add member to KV store: {“message”:“etcdserver: peerURL exists”}

I am running the following join command:

docker run --rm -it
–name ucp
-v /var/run/docker.sock:/var/run/docker.sock
join --replica --interactive

(Vivek Saraswat) #2

@hgupta123 sorry for the slow response. Is this failure occurring when you do a replica install on the 2nd or 3rd controller? Did the 1st controller install successfully? And can you join non replica nodes?